Silicone and quartz producer Momentive Performance Materials Inc., owned by Apollo Global Management LLC , yesterday filed for chapter 11 protection as part of a "restructuring support agreement" with some of its creditors, Reuters reported today. Momentive listed assets and liabilities of above $1 billion, according to its bankruptcy filing. The restructuring includes a $600 million rights offering, which will provide the company a significant equity infusion, along with exit financing commitments of $1.3 billion, it said.